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International maritime signal flags are various flags used to communicate with ships. The principal system of flags and associated codes is the International Code of Signals. [1] Various navies have flag systems with additional flags and codes, and other flags are used in special uses, or have historical significance. [2]
The International Code of Signals (INTERCO) is an international system of signals and codes for use by vessels to communicate important messages regarding safety of navigation and related matters. Signals can be sent by flaghoist, signal lamp ("blinker"), flag semaphore, radiotelegraphy, and radiotelephony.
As well as digit flags, the code used "repeat" flags so that only one set of digits was needed; thus the word do, coded as "220", used a "2" flag, a "first repeat" flag here serving as a second 2, and a "0" flag. [12] The end of the message would be indicated by an "end of code" flag (blue over yellow diagonally split). [10] [12]
The rank flag or distinguishing flag is the flag worn by a superior officer on their flagship or headquarters (hence the term flagship). The origins of this are from the era before radiotelegraphy and radiotelephony, when orders were given by flag signals. The flag denotes the ship which must be watched for signals designating orders. Such ...
The meanings of the shapes are defined by the International Regulations for Preventing Collisions at Sea (ColRegs). Day shapes from ColRegs Day shapes are black in color and their sizes are determined by the ColRegs; for example, the size of the ball is not less than 0.6 metres (2.0 ft).
The flag even has its own day -- each year Americans celebrate flag day on June 14. Check out some variations of the U.S. flag throughout history. Show comments. Advertisement. Advertisement.
But they retain additional flags for naval usage (such as related to maneuvering or status), and use their own codes. E.g., in the ICS the single flag Mike means the vessel is stopped; in the U. S. Navy it means the duty medical officer is on board. Flaghoist was the only way ships could signal prior to the advent of radio and blinking light ...
For Pride month 2023, learn the significance of different LGBTQ flags, including the Gilbert Baker Pride Flag, Traditional Pride Flag, and Progress Pride Flag.